# Image Ruler vs 3D Snap

The clearest difference is rating: 3D Snap at 3.9 against Image Ruler's 1.6. 3D Snap also leads on ratings volume (582 vs 45) and review sentiment (31% vs 18%). Image Ruler's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (15.1 vs 18.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Image Ruler sells 5 one-off in-app purchases and 3D Snap sells 10 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

3D Snap holds the better App Store score, 3.9 against 1.6. That said, the two scores are not equally well evidenced: 3D Snap has 582 ratings behind it against 45, so its average is the more settled of the two. Written reviews point the same way: 18% of Image Ruler's written reviews are positive against 31% of 3D Snap's.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Image Ruler | 3D Snap |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.6 (45 ratings)](https://appshunter.io/ios/app/image-ruler-measures/id1474481911/reviews) | **[3.9 (582 ratings)](https://appshunter.io/ios/app/3d-snap-lidar-room-scanner/id6477467417/reviews)** |
| Number of ratings | 45 | **582** |
| Positive reviews | 17.6% of reviews | **30.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | — | **#160** |
| Size | 47 MB | 170 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Martin Schurmann](https://appshunter.io/developer/1469819101) | [BPMobile](https://appshunter.io/developer/1085442365) |

## What reviewers say

### Image Ruler

[App page](https://appshunter.io/ios/app/image-ruler-measures/id1474481911)

This app allows you to measure objects directly on photos. Simply take a picture, mark a known object for reference, and then draw measurements on other items within the same image. It supports both metric and imperial units and offers intuitive editing tools.

**Highlights:** Measure objects on photos, Use a known object as a reference, Supports metric and imperial units, Intuitive editing interface, Organize photos easily, Zoom for precision

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| imageRulerPro | $0.99 | one-time |
| Small Tip | $0.99 | one-time |
| Medium Tip | $2.99 | one-time |
| Big Tip | $4.99 | one-time |
| Big tip | $4.99 | one-time |


### 3D Snap

[App page](https://appshunter.io/ios/app/3d-snap-lidar-room-scanner/id6477467417)

**Currently charting:** #160 Top Grossing · Productivity (US App Store)

Transform your iPhone into a powerful floor plan creator and 3D scanner using LiDAR technology. Quickly capture room layouts, measure spaces, and visualize objects in 3D for renovation, interior design, or moving.

**Highlights:** LiDAR-powered room scanning, Instant floor plan generation, 3D object scanning from photos, Accurate AR measurements, Export floor plans and 3D models, Measure walls, areas, and furniture

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $5.99 | per 7 days |
| Premium | $5.99 | per 7 days |
| Premium | $6.99 | per 7 days |
| Premium | $6.99 | per 7 days |
| Premium | $7.99 | per 7 days |
| Premium | $8.99 | per 7 days |
| Premium | $9.99 | per 7 days |
| Premium | $9.99 | per 7 days |
| Premium | $19.99 | per year |
| Premium | $29.99 | per year |

**What reviewers like**

- 🚀 Accurate measurements
- 👍 Easy to use
- 🤩 Helpful for home improvement projects
- 💯 Stunningly realistic 3D models

**What reviewers complain about**

- 🐛 Crashes frequently
- 🤯 Confusing navigation and UI
- 💰 Expensive subscription model
- 🚫 Incompatible with older devices
- 🤔 Inaccurate room scans and measurements

**Reported bugs**

- Walls appear crooked in 3D models
- Furniture obstructs accurate scanning
- Difficulty cancelling subscription

**Requested features**

- Ability to edit scanned rooms
- Option to manually input measurements
- Export functionality for floor plans
- Multi-room support


## Frequently asked questions

### Is Image Ruler free?

Image Ruler is free to download, with in-app purchases available.

### Is 3D Snap free?

3D Snap is free to download, with in-app purchases available.

### Which has better reviews, Image Ruler or 3D Snap?

3D Snap is rated higher. Image Ruler averages 1.6 out of 5 from 45 ratings, while 3D Snap averages 3.9 from 582 ratings.

### Do Image Ruler or 3D Snap have ads?

Both Image Ruler and 3D Snap show ads.

### Which is updated more often, Image Ruler or 3D Snap?

Image Ruler ships an update every 3 weeks, and 3D Snap every 3 weeks. Most recently, Image Ruler was updated on November 3, 2026 and 3D Snap on November 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*